Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals

Hyeon Dong Lee, Hobeom Kim, Himchan Cho, Wonhee Cha, Yongseok Hong, Young Hoon Kim, Aditya Sadhanala, Vijay Venugopalan, Joo Sung Kim, Jin Woo Choi, Chang Lyoul Lee, Dongho Kim, Hoichang Yang, Richard H. Friend, Tae Woo Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Ruddlesden–Popper phase (RP-phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light-emitting diodes (LEDs). The critical limitation of LED applications is that the insulating OA arranged in a preferred orientation limits charge transport. Therefore, the ideal solution is to achieve a randomly connected structure that can improve charge transport without hampering the confinement of the electron–hole pair. Here, a structurally modulated RP-phase metal halide perovskite (MHP), (PEA)2(CH3NH3)m−1PbmBr3m+1 is introduced to make the randomly oriented RP-phase unit and ensure good connection between them by applying modified nanocrystal pinning, which leads to an increase in the efficiency of perovskite LEDs (PeLEDs). The randomly connected RP-phase MHP forces contact between inorganic layers and thereby yields efficient charge transport and radiative recombination. Combined with an optimal dimensionality, (PEA)2(CH3NH3)2Pb3Br10, the structurally modulated RP-phase MHP exhibits increased photoluminescence quantum efficiency, from 0.35% to 30.3%, and their PeLEDs show a 2,018 times higher current efficiency (20.18 cd A−1) than in the 2D PeLED (0.01 cd A−1) and 673 times than in the 3D PeLED (0.03 cd A−1) using the same film formation process. This approach provides insight on how to solve the limitation of RP-phase MHP for efficient PeLEDs.

Original languageEnglish
Article number1901225
JournalAdvanced Functional Materials
Volume29
Issue number27
DOIs
Publication statusPublished - 2019 Jul 4

Fingerprint

Perovskite
Nanocrystals
Light emitting diodes
nanocrystals
light emitting diodes
metal halides
Metal halides
Charge transfer
Ammonium Compounds
radiative recombination
perovskites
perovskite
high current
quantum efficiency
slabs
Quantum efficiency
photoluminescence
Photoluminescence

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lee, Hyeon Dong ; Kim, Hobeom ; Cho, Himchan ; Cha, Wonhee ; Hong, Yongseok ; Kim, Young Hoon ; Sadhanala, Aditya ; Venugopalan, Vijay ; Kim, Joo Sung ; Choi, Jin Woo ; Lee, Chang Lyoul ; Kim, Dongho ; Yang, Hoichang ; Friend, Richard H. ; Lee, Tae Woo. / Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals. In: Advanced Functional Materials. 2019 ; Vol. 29, No. 27.
@article{03a31c351bb041fc9ab1df0891d40b83,
title = "Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals",
abstract = "Ruddlesden–Popper phase (RP-phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light-emitting diodes (LEDs). The critical limitation of LED applications is that the insulating OA arranged in a preferred orientation limits charge transport. Therefore, the ideal solution is to achieve a randomly connected structure that can improve charge transport without hampering the confinement of the electron–hole pair. Here, a structurally modulated RP-phase metal halide perovskite (MHP), (PEA)2(CH3NH3)m−1PbmBr3m+1 is introduced to make the randomly oriented RP-phase unit and ensure good connection between them by applying modified nanocrystal pinning, which leads to an increase in the efficiency of perovskite LEDs (PeLEDs). The randomly connected RP-phase MHP forces contact between inorganic layers and thereby yields efficient charge transport and radiative recombination. Combined with an optimal dimensionality, (PEA)2(CH3NH3)2Pb3Br10, the structurally modulated RP-phase MHP exhibits increased photoluminescence quantum efficiency, from 0.35{\%} to 30.3{\%}, and their PeLEDs show a 2,018 times higher current efficiency (20.18 cd A−1) than in the 2D PeLED (0.01 cd A−1) and 673 times than in the 3D PeLED (0.03 cd A−1) using the same film formation process. This approach provides insight on how to solve the limitation of RP-phase MHP for efficient PeLEDs.",
author = "Lee, {Hyeon Dong} and Hobeom Kim and Himchan Cho and Wonhee Cha and Yongseok Hong and Kim, {Young Hoon} and Aditya Sadhanala and Vijay Venugopalan and Kim, {Joo Sung} and Choi, {Jin Woo} and Lee, {Chang Lyoul} and Dongho Kim and Hoichang Yang and Friend, {Richard H.} and Lee, {Tae Woo}",
year = "2019",
month = "7",
day = "4",
doi = "10.1002/adfm.201901225",
language = "English",
volume = "29",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "27",

}

Lee, HD, Kim, H, Cho, H, Cha, W, Hong, Y, Kim, YH, Sadhanala, A, Venugopalan, V, Kim, JS, Choi, JW, Lee, CL, Kim, D, Yang, H, Friend, RH & Lee, TW 2019, 'Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals', Advanced Functional Materials, vol. 29, no. 27, 1901225. https://doi.org/10.1002/adfm.201901225

Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals. / Lee, Hyeon Dong; Kim, Hobeom; Cho, Himchan; Cha, Wonhee; Hong, Yongseok; Kim, Young Hoon; Sadhanala, Aditya; Venugopalan, Vijay; Kim, Joo Sung; Choi, Jin Woo; Lee, Chang Lyoul; Kim, Dongho; Yang, Hoichang; Friend, Richard H.; Lee, Tae Woo.

In: Advanced Functional Materials, Vol. 29, No. 27, 1901225, 04.07.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Efficient Ruddlesden–Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals

AU - Lee, Hyeon Dong

AU - Kim, Hobeom

AU - Cho, Himchan

AU - Cha, Wonhee

AU - Hong, Yongseok

AU - Kim, Young Hoon

AU - Sadhanala, Aditya

AU - Venugopalan, Vijay

AU - Kim, Joo Sung

AU - Choi, Jin Woo

AU - Lee, Chang Lyoul

AU - Kim, Dongho

AU - Yang, Hoichang

AU - Friend, Richard H.

AU - Lee, Tae Woo

PY - 2019/7/4

Y1 - 2019/7/4

N2 - Ruddlesden–Popper phase (RP-phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light-emitting diodes (LEDs). The critical limitation of LED applications is that the insulating OA arranged in a preferred orientation limits charge transport. Therefore, the ideal solution is to achieve a randomly connected structure that can improve charge transport without hampering the confinement of the electron–hole pair. Here, a structurally modulated RP-phase metal halide perovskite (MHP), (PEA)2(CH3NH3)m−1PbmBr3m+1 is introduced to make the randomly oriented RP-phase unit and ensure good connection between them by applying modified nanocrystal pinning, which leads to an increase in the efficiency of perovskite LEDs (PeLEDs). The randomly connected RP-phase MHP forces contact between inorganic layers and thereby yields efficient charge transport and radiative recombination. Combined with an optimal dimensionality, (PEA)2(CH3NH3)2Pb3Br10, the structurally modulated RP-phase MHP exhibits increased photoluminescence quantum efficiency, from 0.35% to 30.3%, and their PeLEDs show a 2,018 times higher current efficiency (20.18 cd A−1) than in the 2D PeLED (0.01 cd A−1) and 673 times than in the 3D PeLED (0.03 cd A−1) using the same film formation process. This approach provides insight on how to solve the limitation of RP-phase MHP for efficient PeLEDs.

AB - Ruddlesden–Popper phase (RP-phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light-emitting diodes (LEDs). The critical limitation of LED applications is that the insulating OA arranged in a preferred orientation limits charge transport. Therefore, the ideal solution is to achieve a randomly connected structure that can improve charge transport without hampering the confinement of the electron–hole pair. Here, a structurally modulated RP-phase metal halide perovskite (MHP), (PEA)2(CH3NH3)m−1PbmBr3m+1 is introduced to make the randomly oriented RP-phase unit and ensure good connection between them by applying modified nanocrystal pinning, which leads to an increase in the efficiency of perovskite LEDs (PeLEDs). The randomly connected RP-phase MHP forces contact between inorganic layers and thereby yields efficient charge transport and radiative recombination. Combined with an optimal dimensionality, (PEA)2(CH3NH3)2Pb3Br10, the structurally modulated RP-phase MHP exhibits increased photoluminescence quantum efficiency, from 0.35% to 30.3%, and their PeLEDs show a 2,018 times higher current efficiency (20.18 cd A−1) than in the 2D PeLED (0.01 cd A−1) and 673 times than in the 3D PeLED (0.03 cd A−1) using the same film formation process. This approach provides insight on how to solve the limitation of RP-phase MHP for efficient PeLEDs.

UR - http://www.scopus.com/inward/record.url?scp=85063695561&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063695561&partnerID=8YFLogxK

U2 - 10.1002/adfm.201901225

DO - 10.1002/adfm.201901225

M3 - Article

AN - SCOPUS:85063695561

VL - 29

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 27

M1 - 1901225

ER -